Electric jack blowing fuse

colliehauler wrote:

Hiking Hunter wrote:
A bad ground doesn't make sense. A bad ground is a high resistance connection and would cause the circuit to draw less current, not more. It could make the jack motor not run, but wouldn't blow a fuse.

Check to see if the (new) leg is binding. A leg binding up (maybe only when it is flexed forward or backward) would cause the motor to draw excessive current.

A leg binding on two jacks in a row?

Yes. I think a bent/binding leg ia a pretty common problem. Also, the OP said he had seen in the Jayco forum where other folks were having similar problems (jack blowing fuses).

It's the first thing I would check.